Composite vascular flow diverter

Abstract

A vascular flow diverter includes a tubular mesh framework which includes a mesh cover and an opening. The tubular mesh framework is collapsible and configured to expand from a collapsed shape to a tubular shape when the vascular flow diverter is deployed. The mesh cover conforms to the shape of the tubular mesh, is surrounded by the tubular mesh framework, and is less porous than the tubular mesh framework. The opening is located within the mesh cover. A delivery wire passes through the opening in order to guide the flow diverter into place over an aneurysm.

The invention claimed is: 
     
       1. A device for deploying a vascular flow diverter, the device comprising:
 a microcatheter comprising a tubular outer wall, a distal end, and a proximal end, the distal end comprising a transverse opening and a longitudinal opening, where the transverse opening is perpendicular entirely along a cross-section of the distal end to a longitudinal axis of the microcatheter and the longitudinal opening is substantially parallel to the longitudinal axis of the microcatheter, and the longitudinal opening intersects the transverse opening; 
 a delivery wire comprising a distal section, a proximal section, and a junction between the distal section and the proximal section, where:
 the distal section has a smaller cross section than the proximal section; 
 the distal section is steerable from a proximal end of the proximal section, where at least a portion of the distal section of the delivery wire is configured to adopt a curved configuration; and 
 the junction is configured to push the vascular flow diverter; and 
 
 a pull wire positioned in a lumen of the delivery wire and terminating at a tip of the distal section,
 where a proximal end of the pull wire may be pulled to form the curved configuration in at least a portion of the distal section, and 
 where the distal section of the delivery wire is sufficiently contiguous to contain, when the pull wire is pulled to form the curved configuration in the distal section, an entire length of a portion of the pull wire extending from the tip of the distal section, through the distal section, and to the junction. 
 
 
     
     
       2. The device for deploying a vascular flow diverter of  claim 1 , where the portion of the distal section of the delivery wire configured to adopt the curved configuration is pre-formed into the curved configuration and configured to revert to the curved configuration from a straightened configuration when the distal section of the delivery wire is deployed from the microcatheter. 
     
     
       3. The device for deploying a vascular flow diverter of  claim 1 , further comprising a radiopaque marker fixed to the junction between the distal section and the proximal section. 
     
     
       4. The device for deploying a vascular flow diverter of  claim 1 , further comprising a radiopaque marker fixed to a tip of the distal section. 
     
     
       5. The device for deploying a vascular flow diverter of  claim 1 , further comprising a radiopaque marker fixed to the distal end of the microcatheter. 
     
     
       6. The device for deploying a vascular flow diverter of  claim 5 , where the radiopaque marker fixed to the distal end of the microcatheter is located between the transverse opening and a proximal end of the longitudinal opening. 
     
     
       7. The device for deploying a vascular flow diverter of  claim 6 , where the radiopaque marker fixed to the distal end of the microcatheter comprises a split ring shape. 
     
     
       8. The device for deploying a vascular flow diverter of  claim 1  where the curved configuration of the distal section of the delivery wire is configured to pass through an opening formed in a tubular mesh vascular flow diverter in order to guide the tubular mesh vascular flow diverter into position over a neck of an aneurysm during deployment of the tubular mesh vascular flow diverter.